1. Recall 12. Nanson's formula for are a defo. n da = det(F) FT P Derive an expression for da dA aton rma where da = magnitude of deformed are a and dA is magnitude of reference area lb, n Ic. Try this out for the case where 24 = X x2 = (1+ ) x 73 = 3 and NA 81 2 Id. Sketch the deformed. evea element + + unit cube is the reference state